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Highlights

  • Rent Special
  • Pet Friendly
  • 24-hour fitness center
  • Quartz countertops
  • Modern appliances
  • Spacious floor plans
  • Stainless steel appliances
  • Conference rooms

Location

2758 78th Ave Se, Mercer Island, WA 98040, USA|Downtown Mercer Island
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Tour Island Square

Contact

Management

Greystar Real Estate Partners, LLC

Leasing office

(253) 944-9012

Open today 

10:00 am–5:00 pm PT

Property Overview

Island Square offers a strong overall combination of value, amenities, and convenience, with an 8.8 expert rating, top marks for price and amenities, and a 9 for location. It features a 24-hour fitness center, quartz countertops, stainless steel appliances, spacious floor plans, and conference rooms, while also standing out for its photos, value per square foot, and appeal for pet friendliness and social life.

This summary uses Zumper’s proprietary data. “Zumper Expert Ratings,” “Things you’ll love,” and “Great for” are based on our internal analyses of market trends and renter insights.

Zumper Expert Rating

8.8
Very Good
With a solid 8.8 out of 10 overall, Island Square is a great option for renters. While some aspects, like Quality, might not be as distinguished as other properties nearby, Island Square has a number of attractive features—namely its Price— so you can be assured your rent will come with a high standard of living.

Things you’ll love

  • Less expensive
  • More space
  • Car charging

Great for

  • Social life
  • Pet owners

Floor plans

E1P2Studio1 bath661 sqft$1,632–$1,939 /mo2 units available
E1J3Studio1 bath581 sqft$1,670–$1,771 /mo1 unit available
E1EStudio1 bath549 sqft$1,686–$1,821 /mo2 units available
E1DPStudio1 bath547 sqft$1,898–$1,935 /mo1 unit available
E1IStudio1 bath575 sqft$1,976–$2,015 /mo1 unit available
E1OStudio1 bath642 sqft$2,042–$2,082 /mo1 unit available
A1B1 bed1 bath637 sqft$2,383–$2,735 /mo2 units available
A1HD1 bed1 bath741 sqft$2,388–$2,455 /mo1 unit available
A1OD21 bed1 bath810 sqft$2,562–$2,768 /mo1 unit available
A1ND31 bed1 bath809 sqft$2,717–$2,935 /mo1 unit available
A1SD31 bed1 bath889 sqft$2,717–$2,935 /mo1 unit available
A1OD1 bed1 bath810 sqft$2,965–$3,235 /mo2 units available
B2DD22 bed2 bath1,071 sqft$3,791–$4,067 /mo2 units available
B2DD2 bed2 bath1,071 sqft$3,848–$3,957 /mo1 unit available
B2RD2 bed2 bath1,277 sqft$3,979–$4,091 /mo1 unit available
B2HD2 bed2 bath1,157 sqft$4,037–$4,328 /mo1 unit available

Let's explore this property.

Amenities for Island Square

Apartment Amenities

Air ConditioningBalcony
Closet Built-InsFireplace
PatioQuartz Counters
Roller ShadesSoaking Tub
Stainless Steel AppliancesUndermount Sink
Wood Plank Flooring

Appliances

In-Unit LaundryWasher and Dryer

Building

Business CenterCats OK
Co-working loungeDogs OK
ElevatorEntertainment Lounge
EV ChargingFitness Center
Onsite RetailPackage Lockers
Parking GaragePodcast Room
Residents LoungeSauna
Smart Home Features

Grounds

BBQ GrillGarage Parking
Outdoor SpaceTerrace with Firepit

Services

On-Site MaintenancePackage Service

Other

Online Rent Payment
Units, floor plans, amenities, dimensions, details, availability, and prices may be approximate and subject to change. Please contact a community representative for more information.

Policies and fees

Applicants

Application Fee

Per-applicant. Refund Policy: Non-refundable. Amount to process application, initiate screening, and take a rental home off the market.

$60

REQUIRED FEES

Administrative Fee

One-time. Refund Policy: Non-refundable. Amount to facilitate move-in process for a resident.

$400

Security Deposit (Refundable)

One-time. Refund Policy: Refundable. Amount intended to be held through residency that may be applied toward amounts owed at move-out. Refunds processed per application and lease terms.

$250–$350

Common Area - Electric

Monthly. Refund Policy: Non-refundable. Shared amount for common area electric usage.

Usage Based

Common Area - Gas

Monthly. Refund Policy: Non-refundable. Shared amount for common area gas usage.

Usage Based

Trash Services - Hauling

Monthly. Refund Policy: Non-refundable. Amount for shared trash/waste services.

$42

Utility - Billing Administrative Fee

Monthly. Refund Policy: Non-refundable. Amount to manage utility services billing.

$5.75

Utility - Electric - Third Party

Monthly. Refund Policy: Non-refundable. Amount for provision and consumption of electric paid to a third party.

Usage Based

Utility - Final Bill Fee

One-time. Refund Policy: Non-refundable. Amount billed to calculate final utility statement.

$17

Utility - Gas

Monthly. Refund Policy: Non-refundable. Amount for provision and consumption of natural gas.

Usage Based

Utility - New Account Fee

One-time. Refund Policy: Non-refundable. Amount to establish utility services.

$17

Utility - Sewer

Monthly. Refund Policy: Non-refundable. Amount for provision of sewer services.

Usage Based

Utility - Stormwater/drainage

Monthly. Refund Policy: Non-refundable. Amount for provision of storm water services.

Usage Based

Utility - Water

Monthly. Refund Policy: Non-refundable. Amount for provision and consumption of water.

Usage Based

Internet Services

Monthly. Refund Policy: Non-refundable. Amount for internet services provided by community.

$70

Package Services

Monthly. Refund Policy: Non-refundable. Amount for package services.

$15

Renters Liability Insurance - Third Party

Monthly. Refund Policy: Non-refundable. Amount for renters liability insurance obtained through resident's provider of choice.

Usage Based

OPTIONAL FEES

Parking Policy

Other

Amount for covered parking space/services. May be subject to availability.

Garage Lot

Amount for garage parking space/services. May be subject to availability.

Parking - Covered

Parking - Covered

Monthly. 2 parking - covereds max. Refund Policy: Non-refundable. Amount for covered parking space/services. May be subject to availability.

$105

Parking - Ev

Parking - Ev

Monthly. 2 parking - evs max. Refund Policy: Non-refundable. Amount for electric vehicle space; reserved or pay-per-use station. May be subject to availability.

$200

Parking - Garage

Parking - Garage

Monthly. 2 parking - garages max. Refund Policy: Non-refundable. Amount for garage parking space/services. May be subject to availability.

$175–$200

Dog Policy

Allowed

Cat Policy

Allowed

Pet

Pet Deposit (Refundable)

One-time. 2 pets max. Refund Policy: Refundable. Amount for pet living in rental home. May be assessed per pet or per rental home, based on lease requirements. Refunds processed per lease terms.

$250

Pet Fee

One-time. Refund Policy: Non-refundable. Amount to facilitate authorized pet move-in.

$500

Pet Rent

Refund Policy: Non-refundable. Monthly amount for authorized pet.

$75

SITUATIONAL FEES

Questions about this property’s policies and fees?

Building details

Property details

Units235
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About Island Square

HomeApartments in Mercer IslandDowntown Mercer Island Island Square

sland Square offers renovated studio, one-, and two-bedroom apartment homes in the heart of Mercer Island. Updated interiors feature Swiss elm cabinetry, quartz countertops, stainless steel appliances, brushed nickel fixtures, and wood plank flooring. Spacious floor plans include modern appliances and large windows that create a bright, inviting atmosphere. Residents enjoy a 24-hour fitness center and a new clubhouse with coworking spaces, conference rooms, lounge seating, and a podcast room. With convenient access to Light Rail, shopping, dining, and outdoor recreation, Island Square connects you to the best of Mercer Island living.


Zumper Expert Rating

Our expert rating is based on a weighted average score of property attributes that renters care about most: price, amenities, location, quality, and trust.
8.8
/10
Very Good
With a solid 8.8 out of 10 overall, Island Square is a great option for renters. While some aspects, like Quality, might not be as distinguished as other properties nearby, Island Square has a number of attractive features—namely its Price— so you can be assured your rent will come with a high standard of living.
How we rated Island Square
Price·10A score that weighs the cost and location of the property, which we calculate by comparing rent prices of recent units to the median price of nearby rentals, adjusting for overall quality and features.
Island Square offers an excellent balance between price and value. It's priced competitively for its amenities, location, and other key features. Compared to the median price per bedroom in the area, this property is less than, or about the same as, nearby rentals, so residents can expect great value without too many compromises on their desired standard of living.
Amenities·10A score based on the amenities offered at this property compared to other rentals in the area. We consider the quantity, quality, and popularity of features both on site and within the units.
Island Square stands out as a premier property with an impressive array of amenities and an excellent standard of living. Residents here have access to many of the most popular and desired perks—pets allowed—making this one of the top choices for renters seeking unparalleled comfort and convenience.
Location·9A score based on proximity and ease of access to shops, restaurants, schools, and public transportation while considering the desirability of the area.
Island Square is exceptional when it comes to location and conveniences. Communication with management or leasing staff is usually quick and easy and they often use advanced scheduling and communication tools to streamline the process. The location of this property offers easy access to popular points of interest in the area and options for getting around.
Quality·6A score based on what makes the property stand out, such as luxury features, unique offerings, age of the building, and our ability to verify the accuracy of these details.
While Island Square does not have many hallmark characteristics to highlight, it has some qualities and features that will resonate with a broad range of renters.
Trustworthiness·8A score based on the accuracy, completeness, recency, and usefulness of the information provided by this property, so you can trust that what you see is what you get.
The level of transparency this property provides distinguishes it as a great rental. With a high attention to detail and desirable features, renters can be sure they will get an accurate picture of their potential new home.

Island Square is great for:

Social life

  • Areas nearby are accessible by walking
  • Community gathering spaces on-site (lounges, rooftops, etc.)
  • The area has transit options
  • 12 museums, art galleries, or cultural centers within 1 mile

Pet owners

  • Outdoor spaces are available at this property
  • 5 pet hospitals in the area
  • 8 pet supply stores near the property
  • 1 pet grooming service nearby

Property highlights

We compared every listing in the surrounding area to determine which amenities are most common. If a building lacks an amenity that most others in the area have, it is a con. If a building has an amenity most others in the area do not, it is a pro. Similarly, price, schools, and size are calculated relative to the size, price, and distance to schools of the other properties nearby.

How Island Square compares to other nearby properties.

Positives

Less expensive
Studio units are cheaper than other similar listings nearby
More space
The 2-bedroom is 80 sqft larger than other listings nearby
Car charging
Dedicated charging spot
Elevator
Improved accessibility features
Fireplace
In-unit features
Fitness center
The gym is just a few steps away
Images Available
There are at least 10 photos of this property
In-house dry cleaning
Laundry services available
Package service
More secure storage for delivery

Considerations

Greater distance from middle schools
The nearest middle school is farther than 3.3 miles away
No in-unit dishwasher
Dishwashers aren't available

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Rent trends in Downtown Mercer Island

Studio apartments at Island Square cost about 11% less than the average rent price for studios in Downtown Mercer Island.

1-bedroom apartments here are priced 0% higher than 1-bedrooms in Downtown Mercer Island.

If you decide to upgrade your space, you can expect 2-bedrooms at Island Square to be 10% more than the average for similarly sized apartments in Downtown Mercer Island.

Median rents as of Oct 3 2026.
Downtown Mercer Island
Mercer Island
A table of studio rental data trends in Mercer Island
MonthMedian Rent
October 2024$1,982
November 2024$2,000
December 2024$1,895
January 2025$2,026
February 2025$2,134
March 2025$1,967
April 2025$1,843
May 2025$1,883
June 2025$1,938
July 2025$1,879
August 2025$1,919
September 2025$1,931
October 2025$1,913
November 2025$1,967
December 2025$1,956
January 2026$2,066
February 2026$2,083
March 2026$1,931
April 2026$2,004
May 2026$2,052
June 2026$2,222
July 2026$2,295
August 2026$2,198
September 2026$2,161
October 2026$2,042
A table of studio rental data trends in Downtown Mercer Island
MonthMedian Rent
November 2024$2,000
December 2024$1,807
January 2025$1,991
February 2025$2,134
March 2025$1,967
April 2025$1,843
May 2025$1,883
June 2025$1,938
July 2025$1,878
August 2025$1,899
September 2025$1,925
October 2025$1,913
November 2025$1,967
December 2025$1,956
January 2026$2,066
February 2026$2,083
March 2026$1,931
April 2026$2,004
May 2026$2,052
June 2026$2,222
July 2026$2,295
August 2026$2,198
September 2026$2,161
October 2026$2,042

Affordability calculator

Can I afford to live at 2758 78th Ave Se?

Bedrooms

Rent-to-income ratio

30%

Slide to adjust the percentage of your monthly income you are willing to spend on rent.
The general rule of thumb is to spend around 30% or less of your income on rent.
Recommended income

$67,440/yr

With your selected rent-to-income ratio, you'd ideally want to make $67,440 annually to afford this studio median monthly rent price of $1,686.
For more information on rent affordability, visit our rent calculator.

Schools near Island Square

Northwood Elementary School

4030 86th ave se

mercer island, WA, 98040

PK, K-5Public
A

West Mercer Elementary School

4141 81st ave se

mercer island, WA, 98040

K-5Public
A

Island Park Elementary School

5437 island crest way

mercer island, WA, 98040

K-5Public
A

Lakeridge Elementary School

8215 se 78th

mercer island, WA, 98040

K-5Public
A

Bridges Transition

7201 beacon ave s

seattle, WA, 98108

PK, K-12Public
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Internet available near Island Square

Getting around Mercer Island near 2758 78th Ave Se

Walking

7/10
Grab your reusable bags–many shops and stores are within walking distance.

Driving

9/10
Commuting is easy with multiple accessible routes and plenty of parking.

Cycling

5/10
More spots are within biking distance and some roads are cyclist-friendly.

Transit

3/10
There are a few mass transit options within the area.

Points of interest for 2758 78th Ave Se, Mercer Island

Groceries

9/10
Exceptional variety of groceries within a few minutes' walk

Shopping

6/10
Wide variety of shops within a short drive, including some within walking distance

Cafes

8/10
Wide variety of cafés within a few minutes’ walk

Restaurants

7/10
Wide variety of restaurants within a short drive, including some within walking distance

Primary schools

9/10
At least one elementary school within a 10-minute walk

High schools

2/10
At least one high school within a 30-minute walk

Parks

8/10
Large amount of park space nearby

Nightlife

5/10
Variety of bars within a short drive

Explore the area around 2758 78th Ave Se

QFC
7823 SE 28th St
New Seasons Market
2755 77th Ave SE
Global Market Insite
2835 82nd Ave SE
Mercer Island Farmers Market
7700 SE 32nd St
Metropolitan Market LLC
1500 114th Ave SE

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